<html>
<head>
<title>一个小型的JS在线文本编辑器</title>
<script language="javascript">
var edit; //当前选择的文本编辑区域对象
var RangeType; //对象类别
function start() //开始初始化编辑器-编辑区域是Iframe
{
Editor.document.designMode="ON";
Editor.document.open();
Editor.document.write(myTextArea.value);
Editor.document.close();
fnInit()
}
function setFocus() {
Editor.focus(); //编辑器或去焦点
}
function selectRange(){
edit = Editor.document.selection.createRange(); //编辑器的文本选择区域
RangeType = Editor.document.selection.type;
}
//包装文本选定区域的执行命令
function execCommand(command,para) {
setFocus();
selectRange();
if (para=="") //没有参数的情况
edit.execCommand(command)
else
edit.execCommand(command, false, arguments[1]);
Editor.focus();
if (RangeType != "Control") edit.select();
}
//获取或设置文本的格式-字体、字号
function doSelectC(str,el) {
var Index = el.selectedIndex;
if (Index != 0)
{ el.selectedIndex = 0;
execCommand(str,el.options[Index].text);
}
}
//获取或设置当前选定块的格式化标签
function doSelectCl(str,el)
{
var Index = el.selectedIndex;
if (Index != 0)
{ el.selectedIndex = 0;
execCommand(str,"<"+el.options[Index].value+">");
}
}
//初始化
function fnInit(){
for (i=0; i<document.all.length; i++)
document.all(i).unselectable = "off"; //指定不选中任何元素
getSystemFonts();
}
//获取系统字体的方法
function getSystemFonts()
{
var a=dlgHelper.fonts.count;
var fArray = new Array();
var oOption = document.createElement("OPTION");
oOption.text = "字体";
oOption.value = "0";
selectFontName.add(oOption);
//使用DOM方法createElement将字体依次添加到复选列表中
for (i = 1;i < dlgHelper.fonts.count;i++)
{
fArray[i] = dlgHelper.fonts(i);
var oOption = document.createElement("OPTION");
oOption.text = fArray[i];
oOption.Value = i;
selectFontName.add(oOption);
}
}
//格式化，保全script、textarea、xmp、pre和style内容
function formatfor(va) {
var t=va.replace(/\r/g,'');
t = t.replace(/(<(script|textarea|xmp|pre|style).*?>)([^\r]*?)(<\/\2>)/img,
function (){return arguments[1]+arguments[3].replace(/\n/g, "\r")+arguments[4]})
t = t.replace(/\n/g, "");
return t
}
function fontsize(el) //改变字体的方法
{var Index=el.selectedIndex
var addpre="<font size="+el.options[Index].value+">"
if(Index>7)addpre="<font style='font-size:"+el.options[Index].value+"pt'>"
var oSel = Editor.document.selection.createRange()
var sBookmark = oSel.getBookmark()
var oSelhtml=oSel.htmlText
if(oSelhtml!="")
{
//定位选中内容
var conts=oSelhtml
var textLength = Editor.document.body.innerText.length
oSel.moveStart("character", -1*textLength)
var contp=formatfor(oSel.htmlText)
var conta=formatfor(Editor.document.body.innerHTML)
var contpa=''
var partC=""
var partB=""
var partA=""
var m=0
m=conta.indexOf(contp.substr(0,3))
var f=contp.length
for(;f>0;f--)
{if(conta.substr(m,f)==contp.substr(0, f)){contpa=contp.substr(0,f);partC=conta.substr(m+f);break}}
var ko=contp.substr(f)
var kol=ko.length
var ty=conta.substr(m+f,kol)
var hu=""
for(var b=1;b<kol;b++)if(ko.substr(b)==ty.substr(0,kol-b)){hu=ko.substr(b);contpa+=hu;partC=partC.substr(kol-b);break}
var k=contpa.length
cont=conts.replace(/\n/g, "")
var u=cont.length
if(cont==contpa.substr(k-u)){partB=cont;partA=contpa.substr(0,k-u)}else{
for(u=cont.length;u>0;u--)
{if(cont.lastIndexOf(contpa.substr(k-u))!=-1){partB0=contpa.substr(k-u);partA0=contpa.substr(0,k-u);break}}
contt=formatfor(conts)
if(hu!="")if(contt.substr(contt.length-kol)==ko)contt=contt.substr(0,contt.length-kol)+hu
u=contt.length
var youm=contpa.lastIndexOf(contt)
if(youm!=-1){partB=contt;partA=contpa.substr(0,youm);partC=contpa.substr(youm+u)+partC}else{
for(;u>0;u--){if(contt.lastIndexOf(contpa.substr(k-u))!=-1){partB1=contpa.substr(k-u);partA1=contpa.substr(0,k-u);break}}
if(partB1.length>partB0.length){partB=partB1;partA=partA1}else{partB=partB0;partA=partA0}
}
}
if(partB.substr(partB.length-1)=="<"){partB=partB.substr(0,partB.length-1);partC="<"+partC}
if(partB.substr(partB.length-2)=="</"){partB=partB.substr(0,partB.length-2);partC="</"+partC}
//保护textarea、xmp、script和style的内容不被改变
var cook=[]
partA=partA.replace(/(<(script|textarea|xmp|style).*?>)[\s\S]*?<\/\2>/ig,
function (){co=cook.length
cook[co]=arguments[0];return "<cook"+co+">"})
var ook=""
partA=partA.replace(/(<(script|textarea|xmp|style).*?>)[\s\S]*?$/i,
function (){co=cook.length
ook=arguments[2]
cook[co]=arguments[0];return "<cook"+co+">"})
if(ook!=""){fd="(^[\\s\\S]*?<\/"+ook+">)"
jk=new RegExp(fd,["i"])
if(jk.test(partB)){jk.exec(partB)
co=cook.length
cook[co]=RegExp.$1
partB=partB.replace(jk,"<cook"+co+">")}}
partB=partB.replace(/(<(script|textarea|xmp|style).*?>)[\s\S]*?<\/\2>/ig,
function (){co=cook.length
cook[co]=arguments[0];return "<cook"+co+">"})
ook=""
partB=partB.replace(/(<(script|textarea|xmp|style).*?>)[\s\S]*?$/i,
function (){co=cook.length
ook=arguments[2]
cook[co]=arguments[0];return "<cook"+co+">"})
if(ook!=""){fd="(^[\\s\\S]*?<\/"+ook+">)"
jk=new RegExp(fd,["i"])
if(jk.test(partC)){jk.exec(partC)
co=cook.length
cook[co]=RegExp.$1
partC=partC.replace(jk,"<cook"+co+">")}}
partC=partC.replace(/(<(script|textarea|xmp|style).*?>)[\s\S]*?<\/\2>/ig,
function (){co=cook.length
cook[co]=arguments[0];return "<cook"+co+">"})
//处理字体
var dol=[]
var dos=[]
var lon=[]
fd="<FONT([^>]*?)>"
jk=new RegExp(fd,["im"])
while(jk.test(partB)){ce=dol.length
jk.exec(partB)
dol[ce]=RegExp.$1
partB=partB.replace(jk,"<site"+ce+">")
}
ce=dol.length-1
for(;ce>-1;ce--)
{kjc="<site"+ce+">"
fd=kjc+'(.*?)<\/font>'
jk=new RegExp(fd,["im"])
if(jk.test(partB)){dos[dos.length]=ce
jk.exec(partB)
ko3=kjc+RegExp.$1+"</site"+ce+">"
partB=partB.replace(jk,ko3)
}else{lon[lon.length]=ce}
}
partB=partB.replace(/<\/font>/img,"<lonf>")
for(var c=dos.length-1;c>-1;c--)
{
uts=dol[dos[c]]
if(""==(uts.replace(/size=[0-7+]+/i,"").replace(/style=("|')FONT-SIZE: [0-9.]+.*;*("|')/im,"").replace(/[\s\n\r]+/mg,""))){partB=partB.replace("<site"+dos[c]+">","")
partB=partB.replace("</site"+dos[c]+">","")}else{partB=partB.replace("<site"+dos[c]+">","<font"+uts.replace(/ size=[0-7+]+/im,"").replace(/FONT-SIZE: [0-9.]+pt/im,"").replace(/ style=("|');*("|')/im,"")+">")
partB=partB.replace("</site"+dos[c]+">","</font>")}
}
//处理其他标签
var addend=""
var mio=[]
partB=partB.replace(/<([^<> ]*?) [^<>]*?style=[^<>]*?FONT-SIZE: [0-9.]+[^<>]*?>/img,
function (){notv="|select|input|option|object|"
if(notv.indexOf("|"+arguments[1].toLowerCase()+"|")==-1){
op=mio.length
mio[op]=arguments[0]
return "<opis"+op+">"}else{return arguments[0]}})
kba=["h1","h2","h3","h4","h5","h6","pre","button","listing","big","small","tt","code","kbd","samp","td","\/td","caption","\/caption","th","\/th","tr","\/tr","table","\/table","thead","\/thead","tbody","\/tbody","tfoot","\/tfoot"]
for(b in kba){
fd="<("+kba[b]+")[^<>]*?>"
jk=new RegExp(fd,["img"])
partB=partB.replace(jk,
function (){op=mio.length
mio[op]=arguments[0]
return "<opis"+op+">"})
}
//收尾工作
liming=[]
partB=partB.replace(/<(opis|site|lonf)([0-9]*)>/g,
function(){var op=liming.length
if(arguments[1]=="opis"){liming[op]=mio[parseInt(arguments[2])]}
if(arguments[1]=="site"){liming[op]="<font"+dol[parseInt(arguments[2])]+">"}
if(arguments[1]=="lonf"){liming[op]="</font>"}
return "<duan"+op+">"
})
if(liming.length>0){
partB=partB.replace(/^(.+?)(<duan0>)/m,function(){if(""!=arguments[1]){return addpre+arguments[1]+"</font>"+arguments[2]}
else{return arguments[0]}})
var op=liming.length-1
for(var kc=0;kc<op;kc++){
fd="(<duan"+kc+">)(.+?)(<duan"+(kc+1)+">)"
jk=new RegExp(fd,["m"])
partB=partB.replace(jk,
function(){if(""!=arguments[2]){return arguments[1]+addpre+arguments[2]+"</font>"+arguments[3]}
else{return arguments[0]}})}
fd="(<duan"+op+">)(.+?)$"
jk=new RegExp(fd,["m"])
partB=partB.replace(jk,function(){if(""!=arguments[2]){return arguments[1]+addpre+arguments[2]+"</font>"}
else{return arguments[0]}})
}
else{partB=addpre+partB+"</font>"
}
partB=partB.replace(/<duan([0-9]+)>/g,function(){return liming[parseInt(arguments[1])]})
var endtemp=partA+partB+partC
for(vof in cook)endtemp=endtemp.replace("<cook"+vof+">",cook[vof])
Editor.document.body.innerHTML=endtemp
var vrvd=Editor.document.selection.createRange()
vrvd.moveToBookmark(sBookmark)
vrvd.select()
}
else{
Editor.document.selection.createRange().pasteHTML(addpre+"</font>")
}Editor.focus()
el.blur()
el.selectedIndex=0}
</script>
</head>
<body SCROLL="no" bgcolor=d0d0c8 onload="start()" leftmargin=5 topmargin=5>
<OBJECT id=dlgHelper CLASSID="clsid:3050f819-98b5-11cf-bb82-00aa00bdce0b" width="0px" height="0px"></OBJECT>
<select id="select1" style="height: 18" onchange="doSelectCl('FormatBlock',this);this.returnValue=false;" name="select1" size="1">
<option selected value="">段落样式</option>
<option value="P">普通
<option value="H1">标题一
<option value="H2">标题二
<option value="H3">标题三
<option value="H4">标题四
<option value="H5">标题五
<option value="H6">标题六
<option value="p">段落
<option value="dd">定义
<option value="dt">术语定义
<option value="dir">目录列表
<option value="menu">菜单列表
<option value="PRE">已编排格式
</select>
<select style="height: 18"
onchange="doSelectC('FontName',this,'font face="'+this.value+'"')"
name="selectFontName"></select></td>
<select style="width: 60; height: 18" onchange="fontsize(this)" name="selectFontSize" size="1">
<option selected>字号</option>
<option value="7">一号
<option value="6">二号
<option value="5">三号
<option value="4">四号
<option value="3">五号
<option value="2">六号
<option value="1">七号
<option value=1>1 pt
<option value=2>2 pt
<option value=3>3 pt
<option value=4>4 pt
<option value=5>5 pt
<option value=6>6 pt
<option value=7>7 pt
<OPTION value=8>8 pt
<OPTION value=9>9 pt
<OPTION value=10>10 pt
<OPTION value=11>11 pt
<OPTION value=12>12 pt
<OPTION value=13>13 pt
<OPTION value=14>14 pt
<OPTION value=15>15 pt
<OPTION value=16>16 pt
<OPTION value=17>17 pt
<OPTION value=18>18 pt
<OPTION value=19>19 pt
<OPTION value=20>20 pt
<OPTION value=21>21 pt
<OPTION value=22>22 pt
<OPTION value=23>23 pt
<OPTION value=25>25 pt
<OPTION value=28>28 pt
<OPTION value=30>30 pt
<OPTION value=35>35 pt
<OPTION value=40>40 pt
<OPTION value=45>45 pt
<OPTION value=50>50 pt
<OPTION value=60>60 pt
<OPTION value=70>70 pt
<OPTION value=85>85 pt
<OPTION value=100>100 pt
<OPTION value=120>120 pt
<OPTION value=150>150 pt
<option value=200>200 pt
<option value=250>250 pt
<option value=300>300 pt
<option value=500>500 pt
<option value=900>900 pt
<option value=2000>2000 pt</select>
<IFRAME id="Editor" Name="Editor" style="WIDTH: 100%; HEIGHT: 98%;"></IFRAME>
<textarea name=myTextArea style="display:none">
2D-Position 允许通过拖曳移动绝对定位的对象<br/>[2D定位只对样式设置为Position:absolute的元素有效]<br/>
命令document.execCommand("2D-Position",false,true)能打开文档的2D定位，当容器的contentEditable标记为true时，可以拖动容器内的控件、改变控件大小、编辑控件文本内容。第3个参数设置为true时可以拖动元素，否则不能。
</textarea>
</body>
</html>
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